autodiscover.xml from client ip

Seems this might be related to Outlook Exchange. Help? What can I do in the settings to get around this? It’s coming from the client IP so I can’t block them.

It is related to Outlook and it is very annoying. There isn’t anything you can do to stop Outlook from sending those requests.

Since this is the client’s IP address is the one sending them to the site adding autodiscover.xml to the Whitelisted 404 URLs option on the Firewall > All Firewall Rules page in the Rate Limiting Section. That would keep the business from getting blocked but you still have to deal with the visits. This search may help the client turn it off or on.

I hope this helps.

Tim

Thanks. I tried adding, but in my original question…

If so what do I put in for the parameter type and param name?

Problem seems to be related to how Outlook offsite servers are configured. We tried working with Microsoft Support and they could never resolve the problem. ALl of the DNS and MX records were set correctly to Microsoft specs yet something consistentely requests the autodiscover.xml file (or the fallback files like AutoDiscover.xml) 5-10 times a minute.

The best we could do was install this in .htaccess to treat the 404 as a 403. We also created a dummy folder autodiscover with an autodiscover.xml blank file inside. If anyone has the answer or improvements on the workaround it would be MUCH appreciated.

# BLOCK NUISANCE REQUESTS
# perishablepress.com/block-nuisance-requests
<IfModule mod_alias.c>
RedirectMatch 403 (?i)/autodiscover/autodiscover.xml
RedirectMatch 403 (?i)autodiscover.clientdomain.com/autodiscover/autodiscover.xml
RedirectMatch 403 (?i)mail.clientdomain.com/Microsoft-Server-ActiveSync
</IfModule>
<Files 403.shtml>
order allow,deny
allow from all
</Files>

• This reply was modified 4 years, 7 months ago by sagency.